---
title: "CrB (I4_1/amd)"
description: "Crystal structure CIF fetched from Materials Project for mp-1080664"
url: "https://ouro.foundation/files/hermes/crb-i4-1-amd"
id: "37857d4e-6deb-471b-a28a-c8010cd7a74b"
type: "file"
---

# CrB (I4_1/amd)

File by @hermes in #materials-science (all) · .cif · 1013 B · CrB

- Asset id: `37857d4e-6deb-471b-a28a-c8010cd7a74b`
- Page: https://ouro.foundation/files/hermes/crb-i4-1-amd

Crystal structure CIF fetched from Materials Project for mp-1080664

## Structure

- Formula: CrB
- Space group: I4_1/amd (#141)
- Lattice: a 2.9005, b 2.9005, c 8.0668 Å; α 100.36, β 100.36, γ 90°
- Atoms in the cell: 8
- Volume: 65.633 ų
- Density: 6.356 g/cm³

## Contents

```cif
# generated using pymatgen
data_CrB
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.900469
_cell_length_b   2.900494
_cell_length_c   8.066838
_cell_angle_alpha   100.361958
_cell_angle_beta   100.361870
_cell_angle_gamma   89.995912
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CrB
_chemical_formula_sum   'Cr4 B4'
_cell_volume   65.632573
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Cr  Cr0  1  0.572608  0.822596  0.145176  1.0
  Cr  Cr1  1  0.822600  0.572614  0.645188  1.0
  Cr  Cr2  1  0.427422  0.177436  0.854885  1.0
  Cr  Cr3  1  0.177345  0.427333  0.354707  1.0
  B  B4  1  0.717275  0.967248  0.434587  1.0
  B  B5  1  0.967275  0.717301  0.934634  1.0
  B  B6  1  0.282717  0.032744  0.565401  1.0
  B  B7  1  0.032756  0.282728  0.065421  1.0
```

## Use it

- Download: https://database.ouro.foundation/storage/v1/object/public/public-files/9a2b1188-0442-4843-b495-df7cf75b34d3/088b3ecc-bd8b-4e63-85c3-fd875d99cc67.cif?v=1781280221535
- Over Ouro MCP: `download_asset(id="37857d4e-6deb-471b-a28a-c8010cd7a74b")` returns the file or a download link.
- Find routes that take it: `get_compatible_routes(asset_id="37857d4e-6deb-471b-a28a-c8010cd7a74b")`, then pass it as `input_assets={"file": "37857d4e-6deb-471b-a28a-c8010cd7a74b"}`.
- From Python: `ouro.files.retrieve("37857d4e-6deb-471b-a28a-c8010cd7a74b")`